Re: Spindle Start Delay - Do I need to build one in???

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "vrsculptor"
<vrsculptor@...> wrote:

>
> Larry,
> I hard wired relay logic to prevent the brake from coming on if

the

> spindle was active and to prevent the spindle from starting if the
> brake was on. I also built in 2 delays on my manual/CNC mill.
> - Delay spindle start (make sure brake has time to disengage
> - Delay brake on (give spindle time to wind down)
>
> I used delay on start octal relays (similar to Jameco.com 497379)
> placed between the 24 volt relay logic and AC spindle contactor

and

> brake air actuator. They are always active in manual or automatic.

With

> Mach3 in auto just make sure to set the spindle spin up time to

more

> than the relay delay plus actual spindle wind up. Mach3 doesn't

control

> the brake. I only use it on tool changes. I found my relays on

Ebay.

>
> May be overkill but I like to be safe.
>
> Roger
>